Beam hoist for looms



A 8 1931. H. A. DAVIS 1,817,894

BEAM HOIST FOR LOOMS Filed Nov. 11, 1929 2 Sheets-Sheet 2 Fig-2.

\nvenTor.

Harry A. Davis ATTys.

Patented Aug. 4, 1931 UNETED STATES rennet j PATENT OFFICE HARRY A. DAVIS, OF HOPEDALE, IMSSAGHUSETTS, ASSIGNOR TO DRAPER CORPORA- TION, OF HQPEDALE, MASSACHUSETTS, A COR-PGRA'IION OF MAINE BEAM HOIST FOR LOOMS Application filed November 11, 1829. Serial No. 406,187.

veniently move a full beam into running position or to facilitate such operation where the beam is of such weight as to require the services of two men.

The object of the invention is further'to provide means readily to handle the beams on a two beam loom.

A further object of the invention is to provide a rigid support to receive the ends of a beam, the support being operable to move the beam into running position, and during such movement to maintain the beam shaft paral lel to its running position.

These and other objects and features will more fully appear from the accompanying 5 drawings in connection with the specification,

and will be particularly pointed out in the claims.

In the drawings:

Fig. 1 is a rear elevation of a loom embodyao inp; the invention.

Fig. 2 is a side elevation of a portion of the loom illustrating the manner of operation of the device.

In the maintenance of a loom much dithculty is encountered in handling a full beam or a beam which is large and heavy. The present invention is concerned with a device adapted to minimize the difficulties thus encountered.

A wide loom employing two beams is shown in the drawings since upon such a loom the difficulty in handling beams is most pronounced, and the utility of the invention is therefore best illustrated on such a loom. In

the usual weave room the looms are spaced a minimum distance apart leaving a very limited space for the operative or operatives to handle the beam. In the usual procedure the beams must be lifted and moved transversely into running position on the loom, a

ed bearings to be hereinafter described. is usual in this type of loom also to providevery difficult operation because of the inabili ity of the operator to assume a. position in which he is able efficiently to manage the great weight of the beam. Usually two operatives must be employed to effect a change of beams one on each end thereof. By the use of the present invention, in a majority of instances one operative may accomplish with easethe complete installation of a full beam in the loom.

in he preferred construction illustrated, a rigid rocker member is pivoted at the back of the loom and extends between the loom sides. The'rocker member is provided with upwardly extending arms rigidly secured thereto,

and having suitable bearings at their upper ends toreceive the beam shaft. As the rocker member is moved about its pivots the arms with their bearings are swung simultaneously from running position to a position rearward of the loom where an exchange of beams may be accomplished with a minmum of effort. The rocker member is then swung to move the beam bodily forward into its running position.

Inasmuch as the invention relates solely to a. beam hoist and lock, only those parts of an ordinary type of loom are shown which are directly associated with the invention.

The" loom illustrated is of the common twobeam type. The beams 1 and 2 are mounted upon a beam shaft 3 which is supported upon the loom sides 4 and 5 in specially constructa center bearing 6 situated between the beams. The loom sides t and 5 are connected by a girder 7 and are provided with shoulders 8 and 9 which receive the weight of the beam. The beams are of usual concured to the loom sides. It may be found necessary in a wide loom such as the one illustrated also to provide a center bearing .13 for the rocker secured to the girder 7 by any suitable means such as the bolt 14:. Each bracket 11 and 12 is provided with an extension 15 which fits against the inner face of the loom side and may conveniently rest upon the upper face of the girder 7. The are secured to the loom sides by means of bolts 16 passing through the extensions 15. V

The lower ends of the brackets 11 and 12 are provided with suitable bearings for the ends of the rocker 10. The extreme lower portions of the brackets are provided with screws 17 which have threaded engagement therewith, and which extend through the bracket and engage the rear faces of the loom sides. The purpose of the set screws 17 is to provide an adjustment to aid in the alinement of the rocker bearings during the assembling process and before the bolts 16 are finally set up. The rocker 10 is herein shown as a hollow shaft of relatively large diameter designed to withstand severe torsional stresses. The rocker may however be of any suitable form. A plurality of beam supporting arms are rigidly secured to the rocker or may be integral therewith. In the structure illustrated three such arms are employed which extend upwardly and forwardly at an angle of approximately thirty degrees from the vertical. One of the arms 18 is rigidly secured to the rocker by a suitable key, and a set screw 19, and has an outwardly extending bearing portion 20 which receives the beam shaft. The bearing 20 is properly situated with relation to the loom side to rest upon the shoulder 8 thereof vhen in running position. A similar arm 21 is secured to the other end of the rocker 10 by means of a key, and a set screw 22. The arm 21 has the extension 28 thereon which constitutes a bearing for the beam shaft, and rests upon the shoulder 9 of the loom side 5. Adjacent the bearing member 3 is secured a. third arm 24 which projects lama;

upwardly between the inner ends of the beams 1 and 2 to support the center of the shaft by means of an open bearing 2t? located at its upper end. A third armis not always essential but is desirable upon looms employing two beams. It is however within the scope ofthe invention to employ any number of such arms.

The bearing members 20 and 23 are constructed to lock the beam shaft in running position, and readily to release it when removal thereof is desired. The bearing 20 has a locking member 26 pivoted thereto at 27, and is detachably held in position against the bearing member 20 by means of an eye bolt 28 pivoted in the member 20, and extending upwardly through the bifurcated end of the locking member 26 having at its upper end a wing nut 29 by means of which the locking member 26 is clamped in position upon the beam shaft. A similar construction is employed at the other side of the loom. A locking member 30 is pivoted at 31 upon the hearing member 23, and is held in position against the beam shaft 3 by means of a wing nut 32 upon an eye bolt 33.

Th 7 full line pesitien of the pa in the drawings indicates their normal. running position. At such times any swinging movement of the arms and the rocker prevented by means of the keepers 34: and which engage the rear face of the bearings 20 and 23 respectively. The keepers may be secured in any suitable way either to the loom side or in the case illustrated to the brackets 11 and 12. The keeper 3% is secured by the bolt 36 in the bracket 11 which passes through a slot 37 in the keeper 3 1-, and has a wing nut 38 thereon which serves to clamp the keeper firmly against the bearing 20. The keeper issimilarly constructed, and is clamped against the bearing 23 by means of the wing nut 39 upon the bolt 10 in the bracket 12. To release the bearings 20 and 23 the wing nuts are loosened. and the keepers-are permitted to move downwardly out, of the .path of the bearings by reason of the slots therein.

In order to facilitate the operation of the device sockets 41 are provided in each arm in which a lever 42 may be detachably fitted. Obviously any other convenient means may be employed to accomplish the same result, namely'that of rotating the rocker 10, such as a lever secured directly to the rocker itself. In 'order to'limit the extent of the rearward movement of the arms a stop device is employed. As shown in the drawin the arms 18 and 21 are provided with depending bosses 13 and 44 having set screws 15 and 46 therein which have screw threaded engagement therewith and are provided with lock nuts 47 and 48 respectively. The set screws are so positioned and are of such a length that their ends may be adjusted to contact with the girder 7 when the arms are in the desired rearward position at which time the lock nuts are tightened and thus a fixed rearward position of the arms is established.

Theoperation of the device is as follows:

When it is desired to renew or exchange beams the lever 12 is inserted in one of the sockets 4:1 and the rocker carrying the arms 1 is moved to its beam receiving position shown in dotted lines in Fig.2. If a beam is already in position and must first be removedthe wing nuts 29 and 32 are loosenedand the eye bolts 28 and 33 are swung out of engagement with ing operation as above described. When the arms are in the position shown in dotted lines Fig. 2 it is obvious that the beam shaft bearings 20 and 23 are in a most accessible position in the aisle between the rows of looms where it is an easy matter to place the beam in position.

In many cases the beam may be transferred from the shop truck to the swinging arms by one man since the truck may be brought into such position that a very slight movement of the beam will effect the transfer. The lever 42 is then operated to swing the rocker with its arms into running position carrying the beam with it. It will be noted that the force exerted at the lever 42 is transmitted through the rocker acting as a torsion member to the other arm or arms thereby maintaining the beam shaft parallel to its running position during such movement. After the beam assumes its running position the keepers 34 and 35 are raised into clamping position and the wing nuts 38 and 40 are tightened. The loom is then ready for operation.

It may be desirable where the beam or beams are very large and heavy to insert a lever in the sockets 41 on both sides of the loom in which case two men are advantageously employed to move the beam into position. In any case it is obvious that during the movement of the beam or beams they are actually raised vertically only a very short distance, since the arc through which they travel is relatively flat, consequently the effort required to move the beams into position is comparatively small.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A beam hoist and lock for looms comprising a rocker journalled in the loom sides and extending transversely therebetween, a plurality of beam supporting arms rigid with said rocker having bearings at their upper ends to receive the beam shaft, said arms being movable by rotation of said rocker to shift said bearings from operative position rearwardly to a convenient beam receiving position.

2. A beam hoist and lock for looms comprising a rocker pivoted upon the loom, a plurality of beam supporting arms rigid with said rocker, separable bearings at the ends of said arms to receive the beam shaft, and means operable to rotate the rocker to swing the arms with their bearings from operative position rearwardly to a convenient beam receiving position.

3. A beam hoist and lock for looms comprising a plurality of brackets secured to the loom, a rocker rotatably mounted in said brackets and extending transversely of the loom, a plurality of beam supporting arms rigid with said rocker and having bearings, said arms movable by rotation of the rocker to position said bearings rearwardly of the loom sides to receive the beam shaft.

4. A beam hoist and lock for looms comprising a plurality of brackets secured to the loom, a rocker rotatably mounted in the brackets and extending transversely of the loom, a plurality of arms rigid with and eX- tending upwardly from the axis of the rocker, separable bearing members on the arms to receive the beam shaft, and movable with the arms by rotation of the rocker to a position rearwardly of the loom, and a lever on one of the arms to rotate said rocker.

5. A beam hoist and lock for looms comprising a plurality of brackets mounted on the loom, a shaft journalled in said brackets, a plurality of arms rigid with and extending upwardly from said shaft, separable bearings on said arms having an overhanging portion normally resting upon the shoulders of the loom sides and movable with said arms by rotation of the shaft to a position rearwardly of the loom and a removable lever attachable to any one of the arms.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS. 

